Add processor power limits control support under common code.
BRANCH=None
BUG=None
TEST=Built and checked this entry on Volteer system,
cat /sys/class/powercap/intel-rapl/intel-rapl\:0/*
Change-Id: I41fd95949aa2b02828aa2d13d29b962cb579904a
Signed-off-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39346
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
4fafd41209